<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>v-for指令</title>
</head>

<body>
    <div id="app">
        <input type="button" value="添加数据" @click="add">
        <input type="button" value="移除数据" @click="remove">

        <ul>
            <li v-for="(it,index) in arr">{{index}}黑马程序员校区:{{it}}</li>
        </ul>
        <h2 v-for="item in vegetables" v-bind:title="item.name">
            {{item.name}}
        </h2>
    </div>
    <!-- 开发环境版本，包含了有帮助的命令行警告 -->
    <script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>
</body>
<script>
    var app = new Vue({
        el: "#app",
        data: {
            arr: [
                "北京",
                "上海",
                "广州",
                "深圳"
            ],
            vegetables: [
                { name: "西兰花炒蛋" },
                { name: "蛋炒西兰花" }
            ]
        },
        methods: {
            add: function () {
                this.vegetables.push({ name: "花菜炒蛋" });
            },
            remove: function () {
                this.vegetables.shift();
            }
        }
    })
</script>

</html>